Nokia and QMUL introduced charging system based on sound waves

Not so long ago Habré publish news about the new system of wireless charging, based on ultrasound. Now a joint team of Nokia and British scientists Queen Mary University of London (QMUL) introduced the charging system based on the effects of ordinary sound waves.

Actually, this idea is not new, the developers say they have taken as a basis the Korean scientists, 2010. Then the Koreans said about the possibility of creating a system based on the microstructures of zinc oxide exhibit piezoelectric properties. This system produces electricity due to vibrations caused by the sound wave, in the very microstructure.

However, the Koreans failed to create a working system that could charge the battery of the mobile device. A Nokia and QMUL succeeded. To create a system developers sprayed zinc oxide in a liquid state on the surface of the plastic sheet.

Then, this sheet was exposed to "a mixture of chemical substances" (which is still unclear), and heated to 90 degrees Celsius. As a result of zinc oxide formed nanoprutki (nanorods). Then, a sheet was placed between two thin plates of gold pin. To reduce the cost of such a system can be used and an aluminum foil according to scientists.

A prototype of the charger based on the effects of sound waves to get the size of Nokia Lumina 925 (well, schem can still compare their development guys from Nokia, right?). Such a charge, using sound waves (normal background noise, including the noise of cars, music, voices, etc.) capable of producing electricity (5B). This is enough to charge a mobile phone. However, the duration of charging developers do not say anything.

As for the Korean system, the author of the idea succeeded voltage is only 50 mV, which is certainly not enough to recharge the battery of the smartphone / tablet.

Via gizmag

Source: habrahabr.ru/post/233349/